3. Qualified business income deduction Renata operates a sole proprietorship selling masks. In 2020 she earned net business income per her Schedule C of $40,000. She did not have any employees. What is her QBI deduction for 2020 if this is her only income for the year? 4. Standard deduction a. Terrance is 70 years old and single. What is his 2020 standard deduction? b. Val is 40, files as head of household and is legally blind. What is her 2020 standard deduction? c. Bill is 14 and the dependent of his parents. He earned $1,200 in wages in 2020 and had tax withheld so he wants to file to get a refund. What is his standard deduction